<template>
    <view>
        <view class="search-box">
            <uni-search-bar  @input="input" :radius="100" cancelButton="none"></uni-search-bar>
            
        </view>

        <!-- 搜索建议列表 -->
        <view class="sugg-list" v-if="searchResults.length !== 0">
            <view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item)">
                <view class="gooods_name">
                    {{item.goods_name}}
                </view>
                <uni-icons type="arrowright" size="16"></uni-icons>
            </view>
        </view>
        
        <!-- 搜索历史 -->
        <view class="history-box" v-else>
            <!-- 标题区域 -->
            <view class="history-title">
                <text>搜索历史</text>
                <uni-icons type="trash" size="17" @click="clean"></uni-icons>
            </view>
            <!-- 列表区域 -->
            <view class="history-list">
                <uni-tag :text="item" v-for="(item,i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
            </view>
        </view>
        
        
    </view>
    
    
</template>

<script>
    export default {
        data() {
            return {
                timer:null,
                kw:'',
                searchResults:[],
                historyList:[]
            };
        },
        onLoad(){
            this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
        },
        methods:{
            // 搜索防抖
            input(e){
                clearTimeout(this.timer)
                this.timer = setTimeout(()=>{
                    // console.log(e.value)
                    this.kw = e.value
                    this.getSearchlist()
                },500)
            },
            async getSearchlist(){
                // 判断搜索关键词是否为空
                if (this.kw.length === 0 ){
                    this.searchResults = []
                    return
                }
                const {data : res} = await uni.$http.get('https://api-hmugo-web.itheima.net/api/public/v1/goods/qsearch?',{query : this.kw})
                console.log(this.searchResults)
                if(res.meta.status !== 200) return uni.$showMsg()
                this.searchResults = res.message
                this.saveSearchHistory()
            },
            gotoDetail(item){
                uni.navigateTo({
                    url:'/subpkg/good_detail/good_detail?goods_id=' + item.goods_id
                })
            },
            saveSearchHistory(){
                // this.historyList.push(this.kw)
                
                const set = new Set(this.historyList)
                set.delete(this.kw)
                set.add(this.kw)
                
                this.historyList = Array.from(set)
                // 对本地历史数据，进行持久化的存储
                uni.setStorageSync('kw',JSON.stringify(this.historyList))
            },
            clean(){
                this.historyList = []
                uni.setStorageSync('kw', '[]')
            },
            gotoGoodsList(kw){
                uni.navigateTo({
                    url:'/subpkg/goods_list/goods_list?query=' + kw
                })
            }
            
            },
            computed:{
                histories(){
                    return[...this.historyList].reverse()
                }
        }
    }
</script>

<style lang="scss">
.search-box{
    position: sticky;
    top: 0;
    z-index: 999;
}
.sugg-list{
    padding: 0 5px;
    .sugg-item{
        display: flex;
        aligen-items:center;
        // 两边贴边对齐
        justify-content:space-between;
        font-size: 15px;
        padding: 13px 0;
        border-bottom: 1px solid #efefef;
        .gooods_name{
            white-space: nowrap;
            // 超出部分隐藏
            overflow: hidden;
            // 超出部分的隐藏形式
            text-overflow: ellipsis;
        }
    }
}
.history-box{
    padding: 0 5px;
    .history-title{
        display: flex;
        justify-content: space-between;
        height: 40px;
        align-items: center;
        font-size: 13px;
        border-bottom: 1px solid #efefef;
        
    }
        .history-list{
            display: flex;
            flex-wrap: wrap;
            .uni-tag{
                margin-top: 5px;
                margin-right: 5px;
            }
        }
        
}
</style>
